From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Yury Norov <yury.norov@gmail.com>
Cc: linux-kernel@vger.kernel.org,
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Subject: Re: [PATCH 08/17] all: replace bitmap_weight with bitmap_weight_{eq,gt,ge,lt,le} where appropriate
Date: Mon, 20 Dec 2021 17:41:02 +0100 [thread overview]
Message-ID: <YcCyHvr1f+Z8M9M1@kroah.com> (raw)
In-Reply-To: <20211218212014.1315894-9-yury.norov@gmail.com>
On Sat, Dec 18, 2021 at 01:20:04PM -0800, Yury Norov wrote:
> Kernel code calls bitmap_weight() to compare the weight of bitmap with
> a given number. We can do it more efficiently with bitmap_weight_{eq, ...}
> because conditional bitmap_weight may stop traversing the bitmap earlier,
> as soon as condition is met.
>
> This patch replaces bitmap_weight with conditional versions where possible,
> except for small bitmaps which size is not configurable and known at
> constant time. In that case conditional version of bitmap_weight would not
> benefit due to small_const_nbits() optimization; but readability may
> suffer.
>
> Signed-off-by: Yury Norov <yury.norov@gmail.com>
> ---
> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +-
> drivers/iio/dummy/iio_simple_dummy_buffer.c | 4 ++--
> drivers/iio/industrialio-trigger.c | 2 +-
> drivers/memstick/core/ms_block.c | 4 ++--
> drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 2 +-
> .../net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c | 2 +-
> .../net/ethernet/marvell/octeontx2/nic/otx2_flows.c | 4 ++--
> drivers/net/ethernet/mellanox/mlx4/cmd.c | 10 +++-------
> drivers/net/ethernet/mellanox/mlx4/eq.c | 4 ++--
> drivers/net/ethernet/mellanox/mlx4/fw.c | 4 ++--
> drivers/net/ethernet/mellanox/mlx4/main.c | 2 +-
> drivers/perf/thunderx2_pmu.c | 4 ++--
> drivers/staging/media/tegra-video/vi.c | 2 +-
> 13 files changed, 21 insertions(+), 25 deletions(-)
"all" is not how to submit changes to the kernel. Please break them up
into subsystem-specific patches, and send them after your core changes
are accepted.
good luck!
greg k-h
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next prev parent reply other threads:[~2021-12-20 16:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-18 21:19 [PATCH v2 00/17] lib/bitmap: optimize bitmap_weight() usage Yury Norov
2021-12-18 21:19 ` [PATCH 01/17] all: don't use bitmap_weight() where possible Yury Norov
2021-12-18 22:15 ` Michał Mirosław
2021-12-18 23:28 ` Yury Norov
2021-12-18 21:19 ` [PATCH 02/17] drivers: rename num_*_cpus variables Yury Norov
2021-12-18 21:19 ` [PATCH 03/17] fix open-coded for_each_set_bit() Yury Norov
2021-12-18 21:20 ` [PATCH 04/17] all: replace bitmap_weight with bitmap_empty where appropriate Yury Norov
2021-12-18 21:20 ` [PATCH 05/17] all: replace cpumask_weight with cpumask_empty " Yury Norov
2021-12-18 21:20 ` [PATCH 06/17] all: replace nodes_weight with nodes_empty " Yury Norov
2021-12-18 21:20 ` [PATCH 07/17] lib/bitmap: add bitmap_weight_{cmp, eq, gt, ge, lt, le} functions Yury Norov
2021-12-18 21:20 ` [PATCH 08/17] all: replace bitmap_weight with bitmap_weight_{eq, gt, ge, lt, le} where appropriate Yury Norov
2021-12-20 16:41 ` Greg Kroah-Hartman [this message]
2021-12-18 21:20 ` [PATCH 09/17] lib/cpumask: add cpumask_weight_{eq,gt,ge,lt,le} Yury Norov
2021-12-18 21:20 ` [PATCH 10/17] lib/nodemask: add nodemask_weight_{eq,gt,ge,lt,le} Yury Norov
2021-12-18 21:20 ` [PATCH 11/17] lib/nodemask: add num_node_state_eq() Yury Norov
2021-12-18 21:20 ` [PATCH 12/17] kernel/cpu.c: fix init_cpu_online Yury Norov
2021-12-18 21:20 ` [PATCH 13/17] kernel/cpu: add num_possible_cpus counter Yury Norov
2021-12-21 13:15 ` Peter Zijlstra
2021-12-18 21:20 ` [PATCH 14/17] kernel/cpu: add num_present_cpu counter Yury Norov
2021-12-21 13:14 ` Peter Zijlstra
2021-12-18 21:20 ` [PATCH 15/17] kernel/cpu: add num_active_cpu counter Yury Norov
2021-12-21 13:13 ` Peter Zijlstra
2021-12-18 21:20 ` [PATCH 16/17] tools/bitmap: sync bitmap_weight Yury Norov
2021-12-18 21:20 ` [PATCH 17/17] MAINTAINERS: add cpumask and nodemask files to BITMAP_API Yury Norov
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